There are entire websites set up to debunk Mr. Gibson....you can start here: http://grcsucks.com/
It doesn't matter. The handwriting is on the wall. It's a logical conclusion.
Point is, operating systems are not the issue, whether Windows, OS X, or Linux. Because when exploits can be crafted by script kiddies (or automatons) in large variant numbers with minor differences in exploit code, then the job of routers, firewalls, IDS, and VA become more and more onerous. Or they simplu break or get raced.There comes a point when their job is *entirely* dependent upon (a) self-generating signature identifications and (b) ASIC-based firewalls or parallel processing platforms. In other words, the existing model of perimeter security models no longer works.
Consequently, the exposure of *all* operating systems becomes more problematic over time.
I don't know why you're arguing the point, every firewall and IDS vendor and security person I know accepts that evolution.